JPS6045883B2 - rice transplanter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rice transplanter, and more specifically, a seedling rod that moves up and down to perform seedling division and planting movements, and a seedling tank for loading and supplying seedlings onto the seedling rod. A float is attached to the lower part of a rice transplanting machine equipped with a float so that it can move far and near in the vertical direction with respect to the rice transplanting machine, and the seedling transplanting machine is automatically controlled to move up and down when the float is further away or closer than a predetermined value. This relates to a rice transplanter that maintains the ground pressure of the float at a substantially constant level and performs highly accurate planting.

Conventionally, this type of rice transplanter has adopted a means for adjusting the seedling planting depth by adjusting the distance between the rice transplanting machine and the float near the seedling rod. However, if you simply adjust the area near the seedling rod, there is a risk that the vertical relationship between the rice transplanting machine and the float at the front of the float will be out of order, which may cause the control mechanism that controls the seedling transplanting machine to move up and down.
For this purpose, floats are attached to the front and rear parts of the rice transplanting machine via interlocking rods, respectively, and swinging rods that operate in the same up and down direction in approximately the same way. However, even in this case, unless the direction angle of the float is adjusted depending on the hardness or softness of the soil surface for seedling planting, the float will not float properly. The forward resistance fluctuates greatly. For this,
It was discovered that the control mechanism that controls the rice transplanting machine up and down does not work properly and malfunctions, making it impossible to plant seedlings with high precision. This invention aims to eliminate the above-mentioned drawbacks, and has taken the following technical measures.

That is, at the bottom of the rice transplanter J body 1, which is equipped with a seedling rod 7 that moves up and down and a seedling tank 5 for loading and supplying seedlings onto the seedling rod 7, there is a float 21 that floats on the soil surface and slides on the ground. , front and rear swinging rods 8 and 9 are provided at the front and rear of the rice transplanting machine 1, which can be rotated up and down, respectively. is a link 23 that can be scaled up and down
At least one of the front and rear swinging rods 8 and 9 is installed on the rice transplanting machine so that it can be rotated up and down and fixed. The front and rear swinging rods 8 and 9 are interlocked and connected via an adjustment device 15 that can adjust the rotational position of the rice transplanting machine 1. and float 2
The rice transplanter is provided with a control mechanism 25 for a hydraulic system so that the distance between the rice transplanter and the rice transplanter 1 is maintained within a predetermined upper and lower range.

This invention will be described in detail based on an embodiment shown in the drawings. Reference numeral 1 denotes a rice transplanting machine, which is moved up and down by a hydraulic piston 2 connected to a hydraulic device at the rear of a tractor body (not shown). It is attached via links 3 and 4.

Reference numeral 5 denotes a seedling tank in which seedlings are placed;
It is arranged so that the seedlings are sent out from the rear lower part.

6 is a seedbed holding rod that holds down the seedbed.

Reference numeral 7 denotes a seedling rod, which is attached to the rice transplanting machine 1 facing the seedling delivery side of the seedling tank 5 so as to move up and down via a crank and a swinging arm, and is used to divide seedlings from the seedling tank and transport them to the lower part. It is designed to be planted on the soil surface.

Reference numerals 8 and 9 indicate a front swinging rod and a rear swinging rod, respectively, both of which are provided in an L-shape, and are bent at the front and rear of the rice transplanting machine, and are pivoted at the bent center portions with horizontal pins 10 and 11. ing.

Reference numeral 12 denotes a planting depth adjusting rod, the base of which is fixed to the rear swinging rod, 9, so as to spring 13 to one left or right side, and has an E-shaped groove fixed to the body 1 side. The middle part of the adjusting rod 12 is fitted into the E-shaped groove of the holding plate 34, so that the rear swinging rod 9 can be adjusted and fixed in swing.

Reference numeral 14 denotes an interlocking rod, one end of which is pivotally connected to the rear swinging rod 9, and the other end of the linking rod 14 being pivotally connected to the front swinging rod 8 via an adjustment device 15.

To explain this adjustment device 15 in detail, a pivot 16 is provided on the front swinging rod 8, a screw shaft 18 on which a handle 17 is provided is rotatably fitted onto the pivot shaft 16, and the screw shaft 18 is connected to the interlocking rod. 14, and by rotating the handle 17 forward or backward, the distance L between the pivoting parts of the interlocking rod 14 to the front and rear swinging rods 8 and 9 is adjusted. It's becoming like that.

The adjusting device 15 may have any configuration other than the above example, but as shown in FIG. Alternatively, a simple interlocking rod 14 may be pivotally connected to this auxiliary link. In this case, the distance L can be quickly adjusted with a one-touch operation. Reference numeral 21 denotes a float, which is disposed at the bottom of the rice transplanting machine so as to slide on the soil surface, and the rear part of the float near the seedling planting position is pivotally connected to the rear swinging rod 9 via a horizontal pin 22. The front part is attached to the front swinging rod 8 via a dome-shaped link 23 that can be expanded and contracted.

A float 21 is always placed at the bending part of this link 23.
A coil spring 24 is provided that can spring downward. 25
is a control mechanism of a hydraulic system, in which the hydraulic valve body 26 side is fixed to the front swinging rod 8, and the operating rod 27 of the valve body is connected to the float 21 side, thereby controlling the vertical distance between the rice transplanting machine body 1 and the float 21. When T is within the appropriate seedling planting range or narrows from 7, the piston 2 is protruded and the machine body 1 is raised, and when it is expanding, the piston 2 is retracted to lower the machine body 1, so that the machine body 1 is always controlled in an appropriate state. ing.

In addition, the symbols shown in the figure, 28 are side floats, 29
indicates the propulsion wheels of the towing vehicle body.

In the configuration of the above example, when plate-shaped seedlings with soil are loaded on the seedling tank 5, the rice transplanting machine 1 is floated on the soil surface using the towing vehicle body, and is towed and slid, and power is transmitted to each rotating part. The seedling tank 5 reciprocates from side to side and sequentially sends out the front end of the plate-shaped seedlings with soil from the rear lower end, and the seedling rod 7 that moves up and down the sent out seedlings divides them into individual plants and levels the ground with floats 21 and 28. Plant on the soil surface.

During such seedling planting work, if the depth of the tiller varies and becomes deeper, the upper and lower links 3 and 4 may be removed from the towing vehicle side.
Since the float 21 on the rice transplanting machine 1 side is strongly pressed against the soil surface through the The switch is made so that the piston 2 protrudes.

Therefore, when the rice transplanting machine 1 rises and the vertical distance between it and the float 21 increases, and the distance T becomes appropriate for planting seedlings, the switching valve returns to neutral and the rise is stopped. Next, as the plowing platform becomes shallower, the rice transplanting machine 1 will be hoisted higher above the soil surface.
Since the switching valve is switched in the opposite direction to the above-mentioned direction via the operating rod 27, the piston 2 is housed in the cylinder. Therefore, the distance between the rice transplanting machine 1 and the float 21, which had been widening, is automatically narrowed and an appropriate distance T is maintained. In this way, even if the tiller fluctuates during rice transplanting, the ground pressure of the float will always be automatically controlled to an appropriate state. However, even if the ground pressure of the float is always maintained at an appropriate level as described above, if the soil surface is extremely soft and the float sinks deep below the soil surface even with the proper ground pressure,
The resistance during sliding increases, and for this reason float 21
This makes it difficult to accurately vertically move the aircraft, resulting in incorrect automatic control.

In such a case, rotate the handle 17 of the adjustment device 15 to move the front swinging rod 8 in the direction of arrow A and adjust the front side of the float 21 to lower it. The machine body 1 is controlled to move upward even if it rises a little, and accurate control is performed without the float 21 being buried deeply in the soil even in the case of extremely soft soil. On the other hand, if the soil surface is hard, rotating the front swinging rod 8 in the opposite direction of arrow A by rotating the handle 17 in the opposite direction will make the vertical control of the rice transplanting machine 1 insensitive. As a result, even if the soil surface is slightly uneven, it will no longer be controlled, and hunting will not occur, allowing smooth control. Through such adjustment, automatic control of the appropriate state will be carried out, but if you want to adjust the seedling planting depth, use the adjustment rod 1.
2 to adjust and set the rear swinging rod 9 up and down, and when you want to plant deeply, adjust the rear swinging rod 9 in the direction of the arrow. On the other hand, if you want to plant shallowly, just adjust it in the opposite direction of the arrow. When the rear swinging rod 9 is swung up and down during such adjustment of the planting depth, it is swung in the same direction as the float 21 mounting portion of the front swinging rod 8 via the interlocking rod 14. Since the float 2 is moved vertically in a substantially parallel state, the automatic vertical movement sensitivity of the rice transplanting machine 1 will not be greatly changed by adjusting the seedling planting depth.

Since this invention has the above-mentioned structure, even if the seedling planting depth is adjusted up or down, the rice transplanting machine can be floated so as not to have a large effect on the control sensitivity for automatically raising and lowering the rice transplanting machine relative to the unevenness of the tiller. In addition, the relationship between the float and the hydraulic control mechanism can be adjusted depending on the hardness and softness of the soil surface, increasing control sensitivity on soft soil surfaces, and conversely, increasing control sensitivity on hard soil surfaces. It has the effect of improving seedling planting performance by making the control sensitivity dull so that hunting elevation does not occur.

Note that the adjustment device 15 is connected to the auxiliary link 2 as shown in FIG.
An electromagnetic telescopic rod 30 is interposed between 0 and the rear swinging rod,
This electromagnetic telescopic rod 30 is mounted on a float 21, and when the soil surface is soft, a detector 32 detects the amount of pushing into the soil surface by a spring 31. It would be very convenient if the electromagnetic telescopic rod 30 is contracted to automatically increase the sensitivity of the elevation control of the rice transplanting machine 1, and conversely, when the soil surface is hard, the sensitivity of the elevation control is automatically decreased.

・The simple explanatory diagrams of the drawings show one embodiment of the present invention, and FIG. 1 is a side view, FIG. 2 is a side view of the main part, FIG. 3 is a slope view of the main part, and FIG. 4 is a rear view of the main part, and FIGS. 5 and 6 are side views of the main part of another example.

) Symbols in the figure: 1 is the rice transplanting machine, 5 is the seedling tank, 7 is the seedling rod, 8 is the front swinging rod, 9 is the rear swinging rod, 14 is the interlocking rod, 15
21 is a float, and 25 is a control mechanism.

Claims (1)

[Claims] 1. At the bottom of the rice transplanting machine, which is equipped with a seedling rod that moves up and down and a seedling tank for loading and supplying seedlings onto the seedling rod, floats that float on the soil surface and slide on leveling the soil are installed in front and behind the rice transplanting machine, respectively. A front and rear swinging rod that can be rotated up and down is provided, the rear part of the float is pivotally attached to the rear swinging rod, and the front part of the float is attached to the front swinging rod in a suspended state via a link that can be expanded and contracted up and down. At least one of the front and rear swinging rods is fixed to the rice transplanting machine so that it can be rotated up and down, and the front and rear swinging rods are both adjusted through an adjustment device that can adjust the rotational position of the two swinging rods. The rods are interlocked and connected, and a hydraulic control mechanism is provided between the float and one of the front and rear swing rods so that the distance between the rice transplanting machine and the float is maintained within a predetermined vertical range. Rice transplanter.